Diuretics cause increased blood PA

My mother has hypertension, and had a triple bypass last year. She takes atenolol and pravastatin. She used to take lasix, but it causes her blood pressure to increase by 30 points. Even otc diuretics like midol do the same thing.  I know diuretics are common for this condition, and I have not read about this happening to other people. Is there another type of diuretic that would not have the same effect?

[jrbon]

Diuretics can produce Hypokalemia (lost of potassium) and this can increase blood pressure. She needs her electrolytes levels check up.

Jesus